Brake for trucks.



G. WIEBKE.

BRAKE FOR TRUCKS. APPLIOATION FILED 001'. 31, 1007.

91 7,392, Patented Apr..6, 1909.

Mzwe saem [wtenzor CHARLES WIEBKE, OF

NEWARK, NEW JERSEY.

BRAKE FOR TRUCKS.

Specification of Letters Patent.

Patented April 6, 1909.

T 0 all whom it may concern:

Be it known that I, OHARLEs "WIEBKE, a citizen of the United States,residing at Newark, in the county of Essex and State of New Jersey, haveinvented a certain new and useful Improvement in Brakes for Trucks, ofwhich the following is a specification, reference being had therein tothe accompanying drawings, forming part thereof.

Certain textile and other machines, such, for example, as textiletwisting machines, are mounted upon wheeled trucks to permit them to bemoved about the floor of the workroom in the course of their operations.In using the twisting operation, however, it is necessary to preventmovement of the truck by the pull of the threads, and the object of thepresent invention is to produce a simple and reliable brake by which awheeled truck of any character may be positively prevented from movingin one direction when the brake is in operative position.

T he invention comprises, broadly, a chock adapted to enter the anglebetween the floor and a wheel rim and to simultaneously engage the floorand the wheel rim, together with improved means for moving and holdingthe chock out of operative position.

'I he invention comprises, further, the use of two chocks operating onthe front and rear wheels respectively and connected together so as tomove simultaneously into and out of operative position.

I will now de cr'be the embodiment of my invention illustrated in theaccompanying drawings, and will thereafter point out my invention inclaims.

In the drawings Figure l is side elevation of a truck embodying thepresent invention, showing the brake in inoperative position. Fig. 2 isa rear elevation of the same. Fig. 3 is a side elevation showing thebrake in operative position.

The illustrated embodiment of the invention comprises a truck 1 providedwith front wheels 2 and rear wheels 3. in front of the rear wheels issuspended a chock 4 consisting of a transverse bar, which is provided atits ends with inclined upper surfaces 5. The chock 4: is secured toupwardly extending arms 6 which have slots 7 in their upper endsengaging pins 8 on the truck. When the chock is permitted to swing underthe iniiuence of gravity its ends enter the angles between the floor andthe rims of the wheels 3,

and the chock engages the floor and the wheel rims simultaneously. Ifnow the truck begins to move forwardly in the direction of the arrow 9,Fig. 3, the wheels at once mount on the chock, the slots 7 permittingthe necessary vertical movement of the truck, so that the wheels aredisengaged from the floor and the Weight of the truck is borne by thechock, which remains firmly fixed on the floor and prevents further movement of the truck. To prevent the chock from moving so far to the rearas to permit the wheels to ride over it, the chock is suspended so thatthe arm 6, in its non-operative position, will be slightly in advance ofthe wheel axle and in its operative position will engage the axle tolimit the rearward movement of the chock. The truck may be freely movedbackwardly, however, the chock, in such case, swinging freely back outof operative position. In order to permit the truck to be moved forwardwhen necessary, means are provided for throwing the chock out ofoperation. A foot lever 10 is fixed to the chock and extends to the rearof the truck. When the lever is de ressed by the foot of the operatorthe chock is swung back out of contact with the floor and the wheels. Aretaining device is provided, consisting of a latch 11 pivoted at itsupper end to the truck and adapted to be swung into operative positionover the lever 10 when the lever is depressed, so as to hold the chockin inoperative position. In the illustrated embodiment of the invention,a second chock 12 is provided for the front wheels 2 of the truck, thischock being supported on the truck in the same manner as the chock 4:. Alink 13 connects the two chocks and constrains them to movesimultaneously into and out of operative position.

The invention is adapted for use on any machine or wheeled vehicle ofwhich it is desirable to limit positively the movement in one direction,and it is obvious that various modifications may be made in theconstruction shown and hereinbefore specifically described. within thespirit and scope of the invention as defined in the following claims.

I claim 1. A brake for machine trucks comprising, in combination with awheeled truck, two chocks adapted to enter, respectively, the anglesbetween the floor and the front and rear wheel rims, and to engage thefloor and the wheel rims simultaneously, fixed means for limiting themovement ofthe checks and connection between the chocks whereby they areconstrained. to move simultaneously into and out of operative position.i

2. A brake for machine trucks comprising, in combination with a wheeledtruck, a chock adapted to enter the angle between the floor and the rimsof a pair of wheels and to engage the floor and the rims of the wheelswhen the truck moves in one direction, connections between the chock andthe truck including an arm pivoted to the truck in position to engagethe axle of the wheels and limit the movement of the chock, and meansfor throwing the chock out of operative position to release the truck.

3. A brake for machine trucks comprising, in combination with a wheeledtruck, a chock adapted to enter the angle between the floor and the rimof a wheel and to enga e the floor and said rim in front of the wheewhen the truck moves in one direction, connection beran ed and o eratinwhen it is de ressed to throw the chock out of operative position torelease the truck.

In testimony whereof I affix my signature in presence of two witnesses.

CHARLES WIEBKE.

Witnesses BERNARD CowEN, MARGARET BEST.

